This model has implications for how we understand complex ideas in our teaching. For example, if we are teaching food webs, our learners will need to have mastered some really simple ideas: foxes eat rabbits; rabbits each grass; grass needs sunlight. This is the first layer of the schema.

The next layer could be the terminology of producer, consumer and predator.

The third layer could be drawing food chains to show the relationships.

The last layer (for now) is drawing these as a food web.

My point is that it is worth periodically going back and checking that all of your learners are aware that foxes are carnivores, and that plants produce their own food before you go on to do something more complex.

This may be obvious, but I find these diagrams remind me the importance of secure foundations and not getting ahead of myself.

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Published by BenRogers

18 years secondary teacher: 4 years primary. MA in SciEd, member of IoP and Chartered Science Teacher. Author of 'Big Ideas of Physics and How to Teach Them.' Works for Paradigm Trust.
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